Home / 20,134.18-27,785.61-11,181.55

Finding the Fourth Proportional to 20,134.18, 27,785.61 and 11,181.55

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Solution

The fourth proportional to 20,134.18, 27,785.61 and 11,181.55 is: 15,430.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,134.18 : 27,785.61 = 11,181.55 : x
  2. Step 2: Convert to fraction form
    20,134.18/27,785.61 = 11,181.55/x
  3. Step 3: Cross multiply
    20,134.18x = 27,785.61 × 11,181.55
  4. Step 4: Simplify right side
    20,134.18x = 310,686,187.50
  5. Step 5: Solve for x
    x = 310,686,187.50/20,134.18
  6. Step 6: Final answer
    x = 15,430.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.